Boom mounted drill support



Feb. 14, 1967 R. L. THOMPSON 3,304,033

BOOM MOUNTED DRILL SUPPORT Filed March 12, 1965 v v 5 Sheets-Sheet 1 o oI Ill" INVENTOR.

ilill o 3 f m I; all. 7

ROBERT L THOMPSON 7 Feb. 14, 1967 R. L. THOMPSON 3,304,033

BOOM MOUNTED DRILL SUPPORT Filed March 12, 1965 s Sheets-Sheet 2INVENTOR. ROBERT L. THOMPSON 14, 7 R. L. THOMPSON 3,304,033

BOOM MOUNTED DRILL SUPPORT Filed March 12, 1965 5 Sheets-Sheet 5INVENTOR. ROBERT L. THOMPSON United States Patent 3,304,033 BOOM MOUNTEDDRILL SUPPORT Robert L. Thompson, Westfield, N.J., assignor toIngersoll-Rand Company, New York, N.Y., a corporation of New JerseyFiled Mar. 12, 1965, Ser. No. 439,411 8 Claims. (Cl. 24816) Thisinvention relates to boom supported rock drill apparatus and hasparticular reference to the provision of a new and improved boom mountedsupport which is particularly adapted to operatively carry substantiallyall forms of boom supported rock drill apparatus and to facilitate angleand cross-hole drilling thereby.

An object of the present invention is to provide a new and improved boommounted support which is particularly adapted to carry substantially allforms of boom supported rock drill apparatus.

Another object of the invention is to provide a new and improved boommounted support of the type set forth which is adapted to carry bothoffsetand center-mounted rock drill apparatus and, thus, eliminates anyrequirement for individual right-hand, left-hand, and centermountingtype booms.

Another object is to provide a new and improved boommounted support ofthe type set forth which facilitates angle and cross-hole drilling bythe carried rock drill apparatus.

Another object is to provide a new and improved boom-mounted support ofthe type set forth which is relatively simple and economical inconstruction and oper-ation.

Another object is to provide a new and improved boommounted support ofthe type set forth which is particularly adapted for drilling equipmentsuch as a tunnel jumbo, but which may be employed wherever rock drillapparatus is boom supported.

Other objects and advantages of the invention will be apparent from thefollowing description taken in connection with the accompanyingdrawings. It will be understood that changes may be made in the detailsof construction and arrangement of parts shown and described as thepreferred forms of the invention have been given by way of illustrationonly.

Referring to the drawings:

FIG. 1 is a top-plan view, partially broken away, of an offset-mounted,boom-supported rock drill embodying the present invention;

FIG. 2 is an elevational view of the boom-supported rock drill shown inFIG. 1;

FIG. 3 is an enlarged, fragmentary, top-plan view of the rock drillsupporting means and offset rock drill mounting shown in FIGS. 1 and 2;

FIG. 4 is a view generally similar to that of FIG. 3, but illustratingthe supporting means in combination with a center rock drill mounting,one of the angular limits of movement of the drill mounting being shownin dotted lines; and

FIG. 5 is a view showing the center rock drill mounting in position forcross-hole drilling.

Referring more particularly to the drawings wherein similar referencecharacters designate corresponding parts throughout the several views,FIGS. 1 and 2 illustrate a rock drill apparatus designated generally atwhich is horizontally offset from and supported by the boom 12.

The rock drill apparatus 10, more specifically, is mounted upon thelongitudinally extending guide or rock drill support 14 which is offsetfrom the boom 12 on the lefthand side of the longitudinal axis thereof.As employed herein, the terms left-hand and right-hand shall beunderstood to designate relative directions as taken from a point ofreference axial-1y behind the boom and facing the rearward end thereof.

The rock drill apparatus 10 comprises the endless chain belt 16 whichpasses longitudinally around the rock drill support 14 and is adaptedfor movement thereabout. The drill actuating motor 18 is mounted uponthe supporting plate 20 which is carried by the chain belt 16 formovement therewith. The drill steel 22 is connected adjacent itslongitudinally rearward end to the actuating motor 18, held in alignmentwith the rock drill support 14 by the centralizer 24, and carries the-'drill 'bit 26 forwardly of the centralizer 24.

The boom 12, more specifically, is adapted for both horizontal andvertical pivotal movement and has an end connected by the universalpivot 28 to the fixed support 30 which may be secured to a drillingplatform. The horizontal pivotal movement of the boom 12 is controlledby a hydraulically operated motor means comprising a cylinder 32 whichis pivotally connected at 34 to the support 30 and a piston rod 36 whichis pivotally connected at 38 to the flange 40 on the boom 12. Thevertical pivotal movement of the boom 12 is controlled by ahydraulically operated motor means which comprise a cylinder 42pivotally connected at 44 to the support 30 and a piston rod 46pivotally connected at 47 to the flange 48 carried by the boom 12. Theboom 12 may also be extensible and include an internal extension,hydraulically operated motor means (not shown) and be provided with aroll-over apparatus to increase the operating flexibility of the rockdrill apparatus 10.

The end of the boom 12 opposite to that pivotally connected to thesupport 30- tixedly carries the yoke member 50 which, in turn, pivotallycarries the connecting member or means 52. The connecting member 52, asillustrated in FIG. 2, is pivotally connected by a pivot pin 51 to theyoke member 50 for vertical movement relative to the boom 12. Thepivotal movement of the connecting member 52 relative to the boom 12 iscon trolled by a hydraulically operated motor means comprising acylinder 54 which is pivotally connected to the ing 56 on the boom 12and a piston rod 58 which is pivotally connected at 60 to the connectingmember 52.

The connecting member 52 is particularly adapted to carry substantiallyall forms of offsetor center-mounted rock drill apparatus 10 relative tothe boom 12 and also facilitates angle and cross-hole drilling by thecarried rock drill apparatus 10'. More specifically, the connectingmember 52 is provided with a single, centrally disposed, primarilypivotal attachment point 62 and a plurality of arcuately disposed,secondary pivotal attachment points 64 radially forward of theattachment point 62. The attachment points 64, as illustrated, arearranged to include a pair of attachment points 64 forward andsubstantially axially of the boom 12, a pair of attachment points 64 onthe left-hand side of the longitudinal axis of the boom 12, and a pairof attachment points 64 on the right-hand side of the longitudinal axisof the boom 12.

As illustrated in FIGS. 1 through 3, the mounting arm 66 is pivotallyconnected adjacent one of its ends at the attachment point 62 on theconnecting member 52 by a pivot pin designated as 63 and extendslongitudinally from the attachment point 62. The opposite end of themounting arm 66 is fixedly secured to the drill support 14 by the boltsor similar fastening means 68 and carries the rock drill support 14offset on the left-hand side of the longitudinal axis of boom 12.

The pivotal movement of the rock drill support 14 relative to the boom12 is controlled by a hydraulically operated motor means com-prising acylinder 70' which is pivotally connected at 72 to the rock drillsupport 14 and a piston rod 74 which is pivotally connected to one ofthe attachment points 64 on the connecting member 52. As the illustrateddrill support 14 is oifset on the left-hand side of the axis of the boom12, the illustrated piston rod 74 is connected by a pivot pin designatedas 75 to one of the pair of attachment points 64- on the right-hand sideof the boom axis. Thus, the rock drill apparatus 10 which is carried bythe left-hand offset drill support 14 is provided with an effectiveoperating range extending axially forward of the boom 12 and in angularrelation thereto.

Similarly, it will be seen that, with a rock drill support 14 mounted bya mounting arm 66 on the right-hand side of the longitudinal axis of theboom 12, the piston rod 74 will be connected to one of the pair ofattachment points 64 on the left-hand side of the boom axis. Again, theoperating range of the rock dri-ll apparatus 10 carried by the rockdrill support 14 will be axially forward of the boom 12 and angularlythere-to.

FIGS. 4 and 5 illustrate the connecting member 52 in combination with arock drill support 14 which is axially or center mounted thereupon. Aswill be seen from FIG. 4, when the use of the rock drill apparatus isrequired forward of the boom 12, the piston rod 74 is connected to themost rearwardly of the attachment points 64 on either side of the boom12. With this connection the rock drill apparatus 10 carried by thecenter-mounted rook drill support may be utilized forwardly of the boom12 and has a horizontal range. of 42 on either side of the longitudinalaxis of the boom 1 As illustrated in FIG. 5, when it is desired thatacross hole be drilled at 90 to the longitudinal axis of the boom 12,the piston rod 74 is connected to one of the pair of attachment points64 which is axially forward of the boom 12.

The operation of the invention is believed to be apparent from theforegoing description.

It will be seen from the foregoing that the boommounted support which isprovided by the present invention carries both offsetand center-mountedrock drill apparatus without modification or alteration and eliminatesany requirement for individual right-hand, left-hand, andcenter-mounting type booms. As will also be seen from the foregoingdescription, the present invention is relatively simple and economicalboth in construction and operation and, although particularly useful fordrilling equipment such as tunnel jumbos, may be employed wherever rockdrill apparatus is boom mounted.

It will be seen from the foregoing that I have provided new and improvedmeans for accomplishing all of the objects and advantages of theinvention.

Having thus described my invention, I claim:

1. An apparatus for mounting a rock drill comprising:

a boom;

a supporting member adapted for carrying a rock drill;

connecting means carried by said boom;

means for pivotally connecting said supporting merriber to saidconnecting means;

said connecting means including a plurality of attachment pointsseparate from said means for pivotally connecting said supporting memberto said connecting means;

motor means connected to said supporting member for pivoting saidsupporting member relative to said boom; and

4. means for connecting said motor means to said connecting memberalternatively at each of two of the plurality of attachments points onsaid connecting means.

2. An apparatus according to claim 1, wherein said connecting meanscomprises a connecting member carried by said boom adjacent one end ofsaid boom.

3. An apparatus according to claim 2, further comprising:

means for pivotally connecting said connecting member for verticalmovement relative to said boom; and

second motor means for pivoting said connecting member relative to saidboom.

4. An apparatus for mounting a rock drill comprising:

a boom;

a supporting member adapted for carrying a rock drill;

a connecting member carried by said boom adjacent one end of said boom;

said connecting member including a primary attachment point and aplurality of secondary attachment points spaced from said primaryattachment'point; means for pivotally connecting said supporting memberto said connecting member at said primary attachment point on saidconnecting member; rn'otor means connected to said supporting member forpivoting said supporting member relative to said boom; and

means for pivotally connecting said motor means to said connectingmember alternatively at each of said secondary attachment points on saidconnecting memher.

5. An apparatus according to claim 4, wherein said secondary attachmentpoints on said connecting member are arranged arcuately around saidprimary attachment point.

6. An apparatus according to claim 5, further comprising:

means for pivotally connecting said connecting member for verticalmovement relative to said boom; and

second motor means for pivoting said connecting member relative to saidboom.

7. An apparatus according to claim 6, wherein said secondary attachmentpoints on said connecting member are arranged arcuately around saidprimary attachment point. p

8. An apparatus according to claim 7, wherein said secondary attachmentpoints are arranged such that one of said secondary attachment points islocated substantially on the axis of said boom, and one of saidsecondary attachment points is located on each side of the axis of saidboom.

References Cited by the Examiner UNITED STATES PATENTS 2,715,525 8/1955Gleason 173-43 X 3,150,723 9/1964 Hale 173 43 X 3,131,325 5/1965Jackoboice 248-l6 3,212,738 10/1965 Curtis et al. 24816 CLAUDE A. LEROY, Primary Examiner.

J. PETO, Assistant Examiner,

1. AN APPARATUS FOR MOUNTING A ROCK DRILL COMPRISING: A BOOM; ASUPPORTING MEMBER ADAPTED FOR CARRYING A ROCK DRILL; CONNECTING MEANSCARRIED BY SAID BOOM; MEANS FOR PIVOTALLY CONNECTING SAID SUPPORTINGMEMBER TO SAID CONNECTING MEANS; SAID CONNECTING MEANS INCLUDING APLURALITY OF ATTACHMENT POINTS SEPARATE FROM SAID MEANS FOR PIVOTALLYCONNECTING SAID SUPPORTING MEMBER TO SAID CONNECTING MEANS; MOTOR MEANSCONNECTED TO SAID SUPPORTING MEMBER FOR PIVOTING SAID SUPPORTING MEMBERRELATIVE TO SAID BOOM; AND MEANS FOR CONNECTING SAID MOTOR MEANS TO SAIDCONNECTING MEMBER ALTERNATIVELY AT EACH OF TWO OF THE PLURALITY OFATTACHMENTS POINTS ON SAID CONNECTING MEANS.